supply of underground, armoured, unscreened, railway signalling cable (heavy duty) with high conductivity copper conductor of size 2 core x 2.5 sq.mm as per specification no.irs: s-63/2014 (rev.4.0).underground, armoured, unscreened, railway signalling cable (heavy duty) with high conductivity copper conductor of size 2 core x 2.5 sq.mm as per specification no.irs: s-63/2014 (rev.4.0).,underground, armoured, unscreened, railway signalling cable (heavy duty ) with high conductivity copper conductor of size 2 core x 2.5 sq.mm as per specificatio n no.irs: s-63/2014 (rev.4.0). [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]